simple.cpp

#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"

int main() {
    llvm::LLVMContext context;
    llvm::IRBuilder<> builder(context);
    std::unique_ptr<llvm::Module> module = llvm::make_unique<llvm::Module>("module", context);

    llvm::Function* main = llvm::Function::Create(llvm::FunctionType::get(llvm::Type::getInt32Ty(context), false), llvm::Function::ExternalLinkage, "main", module.get());
    builder.SetInsertPoint(llvm::BasicBlock::Create(context, "current", main));
    builder.CreateRet(builder.getInt32(100));
    llvm::outs() << *module;
}